Globalization: Sharing germs and defenses, my Tech Central Station column on the mystery pneumonia.

UPDATE: The latest count of suspected and probable cases is 306 cases worldwide with 10 deaths.

UPDATE II: And here's the tally of suspected and probable US cases. (13 cases, no deaths.) It's important to realize that these suspected cases aren't necessarily proven cases. Sometimes, people are dropped from the tally when a different source, such as bacterial pneumonia, is identified.